123creative.com in partnership with Pentode Audio has released Pentode audio VTC-1, a vacuum tube compressor for Windows.

VTC-1 is a special analog modeled virtual VST compressor designed to have a warm analog, fat pumping and transparent sound.

VTC-1 doesn't have a threshold knob, so the user sets the amount of compression by increasing or decreasing input level, similar to older analog tube compressors. The Compression Amount knob is similar to the ratio knob in modern compressors. The user can select two curves of compression with switch: significant compression or smooth curve.